How does a diesel engine work
The fundamental difference is in the methods of forming a mixture of fuel and air. In a diesel engine, fuel and air are supplied separately. The first stage is air supply. At the end of the cycle, the compressed air heats up to a temperature of 700-800C, fuel enters the combustion chamber with nozzles, under high pressure, and instantly ignites spontaneously. To obtain a combustible mixture capable of rapidly self-igniting, it is necessary that the fuel is atomized into smaller particles and that the particle has enough air to ignite. For this purpose, nozzles are used that are injected at a pressure several times the air pressure. In diesel engines, integral combustion chambers are used. In order for the fuel to burn completely and the diesel has the best efficiency, the fuel must be injected into the cylinder before the piston reaches TDC (Top Dead Center). Self-ignition is accompanied by a sharp increase in pressure - hence the increased noise and hardness of work. Such an organization of the working process allows the use of such a cheap fuel as diesel, environmental performance is also improved - when working on such fuel as diesel, thereby reducing the emission of harmful substances into the atmosphere than petrol engines.
